KR20050061362A - Display device driving method, display device, and program - Google Patents

Abstract

The write signal to the display pixel A is a signal corrected based on the input signal to the display pixel B or the write signal. The display pixel B is driven by the same gate line as the gate line for driving the display pixel A, and the source line to which the display pixel B is connected via the switching element is a display pixel ( A) is the same as the source line connected through the parasitic capacitance Csdb. Thereby, in the display apparatus of the system which drives a display pixel using a some source line and a some gate line, such as a liquid crystal display device, cross talk between two display pixels can be reduced.

Description

DISPLAY DEVICE DRIVING METHOD, DISPLAY DEVICE, AND PROGRAM}

The present invention relates to a method of driving a display device, a display device, and a program for improving color reproducibility by reducing color crosstalk.

Many defects have been pointed out conventionally about the color reproducibility of a display apparatus. In particular, in the liquid crystal display device, the following two defects are pointed out.

Many liquid crystal displays obtain transmitted light by using the birefringence of the liquid crystal. Since the transmittances of the liquid crystals of the pixels of each of the RGB colors differ with respect to the same voltage, for example, white (R = G = B) In some cases, the hue may vary depending on the gradation.

For this problem, it is effective to set gamma curves independent of RGB colors, either analog or digital. Thus, the technique which independently corrects each RGB color is described, for example in patent document 1 (Unexamined-Japanese-Patent No. 2002-258813 (September 11, 2002)).

In addition, in the liquid crystal display device which is a shutter type device, light leakage of each color occurs regardless of the display gradation, and in particular, when the display gradation is lowered, color purity (saturation) is reduced due to the light leakage. In addition, even if the contrast is sufficient, the luminance efficiency is important in many liquid crystal display devices, and thus the situation in which the specter characteristics of the backlight and the color filter have to be set widely is in a situation. Even in such a situation, the saturation is lowered as the luminance decreases.

In order to improve such color purity, the saturation emphasis technique is effective by making its saturation stronger for colors having a relatively saturated saturation among pixels, while making its saturation weaker for colors with weaker saturation. Such a saturation correction technique is described, for example, in Patent Document 2 (Japanese Unexamined Patent Publication No. 2003-52050 (published February 21, 2003)).

In addition, as a problem peculiar to TFT-LCDs, a problem of crosstalk caused by the coupling of adjacent pixels through parasitic capacitance is also pointed out. That is, if an insulating film exists between a transparent electrode and a source line, parasitic capacitance may generate | occur | produce there. Similarly, parasitic capacitance is generated between the gate line and the transparent electrode or between the source line and the common electrode. Due to the parasitic capacitance and the capacitance of the liquid crystal itself, there arises a problem that the potential of the display pixel when the gate is turned off is different from the desired voltage, and the display gradation is different from the desired gradation. As a means for solving the problem of crosstalk, a technique for reducing the above parasitic capacitance is described, for example, in Patent Document 3 (Japanese Patent Laid-Open No. 1993-203994 (August 13, 1993)). It is still insufficient to reduce

By the way, such a prior art is effective to adjust the color reproducibility for the whole panel or every display pixel, but cannot respond to the situation where the color reproduced by the display pattern by a display apparatus changes.

That is, a desired voltage is applied to the display pixel connected to the TFT at the gate high moment, and the pixel is connected to many peripheral electric circuits through parasitic capacitance at the gate low. Since most of these peripheral electrical circuits are related to panel design, it is possible to set a drive voltage in consideration of parasitic capacitance between the display pixel and the peripheral electrical circuit in advance. Therefore, the cross talk by the parasitic capacitance formed between the peripheral electric circuits can be compensated in advance. However, since the potential of the source line for driving the other display pixels cannot be defined in advance, the crosstalk caused by the other source line as a factor cannot be compensated in advance.

That is, as shown in Fig. 15A, in the liquid crystal display device, source lines Si (i are integers) and gate lines Gj (j are integers) are provided so as to be orthogonal to each other. It is assumed that the display pixel 100 and the switching element 200 are provided at the intersection portion. In the display pixel 100..., The parasitic capacitance Csda. Csdb. Cgd. Ccs is formed in the display pixel A as follows. In addition, the display pixel B is the meaning of the display pixel which adjoins in the installation direction of the display pixel A and the gate line.

In other words,

Parasitic Capacity Csda… Parasitic capacitance formed between source line S2 for driving display pixel A and display pixel A

Parasitic Capacity Csdb… Parasitic capacitance formed between source line S3 for driving display pixel B and display pixel A

Parasitic Capacity Cgd... Parasitic capacitance formed between gate line G2 for driving display pixel A and display pixel A

Parasitic Capacity Ccs… Parasitic capacitance formed between the common electrode line and the display pixel (A).

It is assumed that the capacitance of the display pixel A itself is Cp, and the voltage applied to each gate line is changed as shown in Fig. 15B. The display pixel A displays the G color, while the display pixel B displays the R color or the B color, and the display gray level of the display pixel A is LA, and the display gray level of the display pixel B is displayed. If L is LB, LA? LB.

In this case, if the drain voltage is applied to the liquid crystal portion of the display pixel A by + V (A) at the gate high, the drain voltage is applied to the liquid crystal portion of the display pixel B by -V (B). . When the next gate line is turned on, -V (A) is applied to the source line for driving the display pixel A, and + V (B) is applied to the source line for driving the display pixel B.

However, the above-described drain voltage is not actually applied to the display pixel A as it is, but a drain voltage changed by the parasitic capacitance is applied. Specifically, assuming that the effective value of the voltage applied to the display pixel A is Va,

Va = V (A) + (Csda * V (A) + Cgd * Vg + Csdb * V (B) + Ccs * Vc) / Cp.

In addition, Vg is a voltage applied to the gate line, and Vc is a voltage applied to the opposite electrode.

In this manner, a voltage different from the desired drain voltage A is applied to the display pixel A. FIG.

Here, since the parasitic capacitance Csda.Cgd.Ccs formed between the display pixel A can be predicted at the design stage, it is possible to set the drain voltage in consideration of the value of the parasitic capacitance. That is, such parasitic capacitance does not affect the display gradation of the display pixel A very much.

However, the parasitic capacitance Csdb and the drain voltage V (B) are included in the above formula of the effective voltage Va. That is, since the voltage Va is influenced by the source line connected to the display pixel B, the color crosstalk in which the gray of the display pixel A changes by the display gray of the display pixel B is generated. .

For example, when V (A) = ± 2.59V and V (B) = ± 1.21V, it was found that the voltage supplied to the display pixel A became ± 2.45V, and the color balance changed.

Further, as described in Patent Document 3, even if the parasitic capacitance is reduced at the design stage, the crosstalk amount can be reduced, and the color crosstalk cannot be completely excluded. Therefore, the potential actually applied to the display pixel is changed according to the display pattern of the entire display device. As a result, the display pixel cannot reproduce the desired luminance.

In addition, it is conceivable to compensate for the crosstalk by newly installing shield electrodes and wirings. However, when a new configuration is provided in the display device, the manufacturing cost of the display device increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above conventional problems, and an object thereof is to provide a driving method, a display device, and a program of a display device which can efficiently reduce cross talk.

In order to solve the above problems, a display device including a switching element and a pixel electrode is disposed to correspond to each of a portion where a plurality of gate lines and a plurality of source lines intersect. In the driving method of, the parasitic between the first display pixel and the second display pixel connected to the same gate line is adjacent to the source line connected to the first display pixel and between the pixel electrodes of the first display pixel. The source line forming the capacitor is connected to the second display pixel, and the write signal to the first display pixel and the input signal to the first display pixel are input to the second display pixel or the second display. The signal is corrected based on the write signal to the pixel.

Moreover, in order to solve the said subject, the display apparatus of this invention is the same gate in the display apparatus in which the display pixel and the switching element were arrange | positioned so that each corresponding part of the some gate line and the some source line may cross | intersect. For the first display pixel and the second display pixel connected to the line, the source line adjacent to the source line connected to the first display pixel and at the same time forming a parasitic capacitance between the pixel electrodes of the first display pixel, Connected to the second display pixel, and the write signal to the first display pixel is corrected based on the input signal to the second display pixel or the write signal to the second display pixel. It is characterized by being a signal.

In a display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of a portion where a plurality of gate lines and a plurality of source lines cross each other, a part of the pixel electrode of the display pixel (first display pixel) is A source line (a source line connected to the second display pixel and driving the second display pixel) adjacent to the source line connected to the display pixel (first display pixel) overlaps with an insulating film or the like. The overlapping portion of the pixel electrode of the first display pixel and the source line connected to the second display pixel forms a parasitic capacitance, and affects the pixel electrode potential of the first display pixel.

Therefore, in the above configuration, the input signal to the first display pixel is corrected based on the input signal to the second display pixel or the write signal to the second display pixel, and this is designated as the write signal to the first display pixel. . That is, the influence of the parasitic capacitance between the pixel electrode of the first display pixel and the source line for driving the second display pixel is considered beforehand, and then the write signal for the first display pixel is determined. Here, the input signal is gray level data or voltage data of each pixel transmitted to the display device, and the write signal is an applied voltage actually applied to the source line or a gray level corresponding to the applied voltage. The write signal of the second display pixel is a signal (voltage or gradation) that corrects an input signal (voltage data or gradation data) of the second display pixel.

As a result, the gap between the display gradation and the desired gradation (crosstalk amount) generated by changing the potential of the parasitic capacitance of the pixel electrode (each pixel electrode) of the first display pixel can be greatly reduced. Improvement (optimization of color balance) becomes possible.

In addition, in the display device of the present invention, a display pixel including a switching element and a pixel electrode is disposed to correspond to each of the crossing portions where the plurality of gate lines and the plurality of source lines intersect, and thus, the first gate line and the first gate line are arranged. The second source line adjacent to the first display pixel connected to the source line is connected to the second display pixel, and the input signal to the first display pixel is input to the second display pixel or the second display pixel. And a correction circuit based on the capacitance value of the parasitic capacitance formed between the write signal to the second source line and the first display pixel, and used as the write signal of the first display pixel. The parasitic capacitance formed between the second source line and the first display pixel may be, for example, a parasitic capacitance between the second source line and the first display pixel, or a parasitic between the second source line and each electrode (drain electrode, etc.) of the switching element. Capacity.

In addition, the display device of the present invention is a display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of an intersection portion where a plurality of gate lines and a plurality of source lines intersect. For the first display pixel and the second display pixel connected to the line, the source line adjacent to the source line connected to the first display pixel and simultaneously forming parasitic capacitance between the first display pixel is the second display. Connected to the pixel, the input signal to the first display pixel is corrected based on the input signal to the second display pixel or the write signal to the second display pixel and the capacitance value of the parasitic capacitance. And a correction circuit serving as a write signal of the display pixel. The parasitic capacitance is, for example, a parasitic capacitance between the source line and the pixel electrode of the first display pixel or a parasitic capacitance between each electrode (eg, the drain electrode) of the switching element of the source line and the first display pixel.

In addition, that any display pixel is connected to the source line means that the pixel electrode of the display pixel is connected to the source line via the switching element.

An embodiment of the present invention will be described with reference to the drawings.

[Configuration of Display Device]

Fig. 2 is an embodiment of the color display device 1 (display device) of the present invention. As shown in Fig. 2, the color display device 1 includes a CCT (color crosstalk) correction circuit 2, a polarity inversion circuit 3, a timing controller 4, a source driver 5, The gate driver 6, the display panel 7, and the storage unit 8 are provided. In addition, in FIG. 2, the structure irrespective of this invention is abbreviate | omitted significantly.

The CCT correction circuit 2 is a configuration according to the characteristic part of the present invention, and the gradation levels of the red signals R and G colors (the second display color) indicating the gradation level of the R color (the first display color) input from the outside. The input signal gradation (input color signal) consisting of the green signal G indicating the gray level and the blue signal B indicating the gradation level of the B color (second display color) is corrected, and each display pixel (pixel group) in the display panel 7 is corrected. And write signal gradation (output color video signal) R ', G', and B 'to (not shown). In addition, the first display color may be cyan, the second display color may be magenta, and the third display color may be yellow. In addition, the CCT correction circuit 2 may be included in the saturation emphasis circuit 10.

The CCT correction circuit 2 latches the input color video signals R, G, and B and delays them by one dot, thereby performing the processing described later on two display pixels connected to the same gate line.

The polarity inversion circuit 3 writes voltages to the display pixels in the display panel 7 based on the write signal gradations R ', G', B '(digital data) output from the CCT correction circuit 2. Determine the signal (analog data).

In the present color display device 1 (display device), as shown in Fig. 14, it is also possible to provide a CCT correction circuit at the front end of the polarity inversion circuit 3. That is, the CCT correction circuit 2 shown in FIG. 14 corrects an input signal voltage (analog data) in the polarity inversion circuit 3 and outputs a write voltage signal (analog data).

The timing controller 4 generates a source driver timing signal and a gate driver timing signal for driving the source driver 5 and the gate driver 6 based on the input RGB synchronization signal. The timing signal for the source driver is input to the source driver 5 via the polarity inversion circuit 3.

The source driver 5 drives each source line connected through TFT to each display pixel provided to the display panel 7 so that the write voltage determined by the polarity inversion circuit 3 is applied to each display pixel. In addition, the source driver 5 may be integrally formed with the polarity inversion circuit 3. In addition, the gate driver 6 is for driving each gate line connected via TFT to each display pixel provided to the display panel 7.

The display panel 7 performs image display by driving a plurality of display pixels arranged in a matrix form by a plurality of source lines and a plurality of gate lines. Specifically, as shown in Fig. 1, the source line Si (i is an integer) and the gate line Gj (j are an integer) are provided to be orthogonal, and at the intersection of each source line and each gate line, the display pixel ( 11) and each display pixel including the switching element 12 are provided.

Here, the display pixel 11... Among the two display pixels driven by the same gate line G2, the pixels of the first display pixel A are adjacent to the source line S2 connected to the first display pixel A as shown in FIG. 1. When the source line S3 which forms a parasitic capacitance between electrodes is connected to the said 2nd display pixel B, the parasitic capacitance Csda, Csdb, Cgd, Ccs around the display pixel A as follows. Is formed.

Parasitic Capacity Csda… Parasitic capacitance formed between the source line for driving the display pixel A and the display pixel A

Parasitic Capacity Csdb… Parasitic capacitance formed between the source line for driving the display pixel B and the display pixel A

Parasitic Capacity Cgd... Parasitic capacitance formed between the gate line for driving the display pixel A and the display pixel A

Parasitic Capacity Ccs… Parasitic capacitance formed between the common electrode line and the display pixel (A).

For this reason, if each display pixel 11 ... is driven as in the prior art without the CCT correction circuit 2, the display gray level of the display pixel of interest is influenced by the voltage applied to the source line for driving the other display pixels. The problem of crosstalk, which is different from the desired gradation, occurs. For example, in the configuration shown in Fig. 1, when the display pixel A as the first display pixel is focused, the display gray level of the display pixel A is the source line S3 which drives the display pixel B as the second display pixel. Will be affected by the applied voltage.

In the color display device 1 of the present embodiment, the CCT correction circuit 2 (see Fig. 2, see Fig. 14) is provided in order to improve the problem of crosstalk generated in this way.

Here, with reference to Figs. 16 and 17, the output process of the write signal by the CCT correction circuit 2 will be described.

Fig. 16 corrects the input signal gradation of the display pixel A based on the input signal gradation of the display pixel B, using the CCT correction circuit 2, and as the write signal gradation of the display pixel A. Figs. It is a block diagram illustrating the case of outputting to the polarity inversion circuit 3.

First, the input signal gradation of the display pixel A on the left side is stored in one dot memory and input to the CCT correction circuit 2 (Fig. 16 (a)). Subsequently, as shown in Fig. 16B, the input signal gradation of the display pixel B is stored in one dot memory and input into the CCT correction circuit 2, but at this time, the display stored first in the one dot memory. The input signal gradation of the pixel A is output and input to the CCT correction circuit 2 together with the input signal gradation of the display pixel B. In the CCT correction circuit 2, the input signal gradation of the display pixel A in this one-dot memory is corrected based on the input signal gradation of the display pixel B, and this is the write signal gradation of the display pixel A. As a result, it is output to the polarity inversion circuit 3.

Fig. 17 corrects the input signal gradation of the display pixel A based on the write signal gradation of the display pixel B using the CCT correction circuit 2 ', and writes the write signal gradation of the display pixel A. As a block diagram illustrating the output to the polarity inversion circuit 3 as an example.

When the scanning direction is referred to as the display pixel A to the display pixel B direction, first, the input signal gray level of the display pixel n leading to the source line of the scanning terminal (right end in the drawing) is transferred to the CCT correction circuit 2. At the same time, input signal gradations of all display pixels other than this display pixel n are stored in the one-line memory. The input signal gradation of the display pixel n is corrected by the CCT correction circuit 2 'and stored in the one-line memory and output to the CCT correction circuit 2' as the write signal gradation of the display pixel n. Here, the CCT correction circuit 2 'reads the input signal gradation of the display pixel n-1 from the one-line memory, and corrects it based on the input signal gradation of the input display pixel n, It outputs as the write signal gradation of the display pixel n-1 and stores it in the one-line memory. If this is done sequentially and the write signal gradation of the display pixel B is stored in the one-line memory and output to the CCT correction circuit 2 ', the CCT correction circuit 2' input signal of the display pixel A. The gradation is read out from the one-line memory, corrected based on the input write signal gradation of the display pixel B, and output as the write signal gradation of the display pixel A, and stored in the one-line memory.

As a result, the write signal gradations of all the display pixels are stored in the one-line memory, and are appropriately output to the polarity inversion circuit 3. At this time, since the order of outputting the write signal gradation to the display panel is reversed in the line, it may be necessary to turn back to the appropriate order.

When the correction (storage to one line memory) direction and the scanning direction of each line are reversed, the write signal gray scale corresponding to each line is output to the polarity inversion circuit 3 along the scanning direction of each line.

In addition, when the scanning direction is referred to as the display pixel B to the display pixel A direction, first, the input signal gray level of the display pixel n leading to the source line of the scan terminal (right end in the drawing) is the CCT correction circuit (not shown). (None), and is output to the polarity inversion circuit 3 as the write signal gradation of the display pixel n. At this time, if the input signal gradation of the display pixel n-1 is input to the CCT correction circuit, it is corrected based on the write signal gradation of the display pixel n, and the write signal gradation of the display pixel n-1 is corrected. Is output as. If this is done sequentially, the input signal gradation of the display pixel B is input to the CCT correction circuit 2, and the write signal gradation of the display pixel B is output, then the input signal of the input display pixel A is input. The gradation is corrected based on the write signal gradation of the display pixel B, and output as the write signal gradation of the display pixel A.

In this way, the write signal gradation of each display pixel is sequentially output to the polarity inversion circuit 3. In this scanning direction, it is possible to omit the one-line memory.

〔2. About correction processing of crosstalk]

[2-1. About fluctuation of brightness balance]

In the color display device 1 of this embodiment, the CCT correction circuit 2 is provided in order to improve the problem of crosstalk generated in this way. In order to clarify the correcting procedure of the input color video signal by these two circuits, the variation of the brightness balance for each display pattern is described below.

For example, it is assumed that patterns 1 to 3 as shown in FIG. 3 are displayed by the display panel 7. Specifically, in pattern 1, R colors, G colors, B colors, black, black, and black are displayed for six adjacent display pixels in order from the left. In addition, in the pattern 2, black, G color, B color, R color, black, and black are displayed. In addition, in the pattern 3, black, black, B color, R color, G color, and black are displayed.

The images displayed on the display panel 7 by each of these patterns 1-3 are all the same. In practice, however, the voltage applied to the display pixel adjacent to the left of the display pixel displaying black (the display pixel having a gradation level of 0) is affected by the applied voltage to the display pixel displaying black. . As a result, the gradation level slightly lower than the desired gradation level is displayed in the pixel adjacent to the left side.

For example, in the pattern 1, since the display pixels of the B color are adjacent to the display pixels of the black color, the B colors are displayed at a gradation level slightly lower than the desired gradation level. Similarly, in the pattern 2, the R color is displayed at a gradation level slightly lower than the desired gradation level, and in the pattern 3, the G color is displayed at a gradation level slightly lower than the desired gradation level. In this way, the luminance balance between the adjacent plurality of display pixels is changed by the display pattern in the display panel.

Considering the case where white is displayed by three adjacent display pixels, as shown in the left side of the equation of FIG. 4, R, G, and B colors are displayed in order from the left to the three display pixels. In that state, the ideal white color is displayed.

On the other hand, in three adjacent display pixels, as shown by the right side of the equation of FIG. 4, white may be displayed by switching the display to each of the following patterns 4 to 6.

That is, in the patterns 4 to 6, if the display colors in each of the three display pixels are described in order from the left pixel,

Pattern 4: R, Black, Black

Pattern 5: Black, G, Black

Pattern 6: Black, Black, B Color

to be.

In other words, the original luminance is the same as the synthetic luminance (red luminance + green luminance + blue luminance -2 * black luminance), but in reality, the synthetic luminance is lower than the luminance. This is because, as described above, the voltage applied to the display pixel of black color is delayed and the voltage applied to the display pixel of R, G, or B color fluctuates.

The relationship between the error rate of the stimulus value of the synthesized luminance and the display gray scale with respect to the original luminance is as shown in FIG. In Fig. 5, the gradation level of the display pixel of interest when the gradation level of the display pixel adjacent to the display pixel of interest is 0 is shown on the horizontal axis. For example, when the display pixel A in the display panel having the configuration shown in FIG. 1 is the attention display pixel, the display gray level shown in the horizontal axis of FIG. 5 is a display pixel when the gray level LB of the display pixel B is zero. It can be considered that the gradation level LA of (A) is shown.

Hereinafter, for convenience of explanation, the horizontal axis in FIG. 5 is described as indicating the gradation level LA of the display pixel A. FIG.

As shown in Fig. 5, when the gradation level LA is on the low gradation side, the change in the stimulus error rate is large. That is, in Fig. 5, when the gradation level LA is at a value from 0 to 128, the curve of the stimulus error rate shows a steep slope. On the other hand, when the gradation level LA exceeds 128, since the curve of the stimulus error rate shows a gentle inclination, it turns out that there is little change in the stimulus error rate.

The correction gradation level necessary for correcting the synthesized luminance in the target display pixel with the original luminance is obtained by dividing the error rate of the stimulus value in each gradation by the rate of change of the stimulus value in the gradation. 6 shows a graph in which the relationship between the correction gradation level and the display gradation is floated.

That is, FIG. 6 is a result of dividing the magnetic pole value of FIG.

As shown in Fig. 6, for example, when the gradation level LA of the display pixel A is zero, the correction gradation level is about zero. Then, as the gradation level LA approaches 128, the correction gradation level increases. On the other hand, when the gradation level LA exceeds 128, there is no clear correlation between the gradation level LA and the corrected gradation level.

6 assumes that the gradation level LB is 0, as shown in FIG. 5, and shows the relationship between the gradation level LA and the corrected gradation. When the gradation level LB becomes a value larger than zero, the correction gradation level decreases by a fixed amount corresponding to the value of the LB. When LB? LA, the correction gradation level becomes zero.

As can be seen from FIG. 5, the change of the error rate is large in low gradation. This indicates that when the display pixel A displays low levels of gradation, the necessity of correcting the synthesized luminance with high accuracy is great.

Therefore, as shown in Fig. 6, by displaying the relationship between the display gradation level and the correction gradation level in the range of gradation level LA from 0 to 128 in a straight line, an appropriate correction gradation according to the gradation level can be calculated. Thereby, the correction of the composite luminance when the gradation level LA is on the low gradation side can be performed with high accuracy.

On the other hand, when the gradation level LA is on the high gradation side, for example, 128 or more, there is no clear correlation between the gradation level LA and the corrected gradation level. Therefore, when the gradation level LA exceeds 128, relatively rough correction is performed as the correction gradation level is set to a constant value.

FIG. 7 shows the relationship between the display gradation level LA and the stimulus error rate when the correction gradation level set as described above is added to the gradation level of the display pixel A. FIG. As shown in Fig. 7, the stimulation error rate, which was 25% at maximum, could be reduced to 5% by adding the correction gradation level.

[2-2. About Crosstalk Correction Using Grayscale Level Data]

From these results, the CCT correction circuit corrects the write signal gradation to the display pixel A and the input signal gradation to the display pixel A based on the input signal gradation or the write signal gradation of the display pixel B. The cross talk amount can be reduced. In other words, by correcting the input signal gradation to the display pixel A based on the input signal gradation to the display pixel B or the write signal gradation, the display pixel A is caused by the parasitic capacitance from the display pixel B. Then, the write signal gradation for the display pixel A can be determined. Therefore, the amount of crosstalk generated between the parasitic capacitance Csd and the display pixel can be reduced, and the display color balance by the display device can be optimized.

Specifically, F is a function in which the gradation level of the display pixel A shown in the digital data is LA, and the gradation level of the display pixel B shown in the digital data is LB, and the LA and the LB are input values. If you say (LA, LB)

The input gradation level to the display pixel A is corrected to be corrected to the gradation level Lout calculated at Lout = LA + F (LA, LB).

By correcting the gradation level LA in this manner, since the input signal gradation to the display pixel A is corrected using the gradation level which is digital data, crosstalk can be reduced by simple processing. In other words, correcting the applied voltage to the display pixel A by using analog data representing the applied voltage may require more bits for processing than to handle digital data, which complicates the processing. In the correction processing using digital data, the complexity of such processing can be avoided.

In addition, when LA is less than a predetermined threshold, F (LA, LB) = k (LA-LB) is defined (where k> 0), and when LA is greater than a threshold, F (LA, LB) Is preferably defined as a function that outputs a constant value.

That is, the values of the correction values F (LA, LB) applied to the LA in order to reduce the cross talk are monotonically in accordance with the value of LA until the LA reaches a predetermined threshold (128 gray levels), as shown in FIG. Increases. In addition, for LA exceeding the threshold (128 gradations), there is no clear correlation between LA and F (LA, LB). In addition, as shown in Fig. 5, since the error rate of the magnetic pole values is lowered, the cross talk is reduced by relatively rough correction, such as outputting Lout by applying a constant value to LA.

Therefore, if F (LA, LB) is defined as described above, Lout can be obtained as a simple process.

Further, when a plurality of integers are extracted from the integers included in the maximum gradation level from 0, and each of the plurality of integers is LA, the value of F (LA, 0) is previously determined in relation to the corresponding LA value. The value of F (LA, LB), which is stored in the lookup table and inputs LA that is not stored in the lookup table, is the value of LA stored in the lookup table, and F (LA, It is more preferable to interpolate based on the value of 0) and the values of LA and LB satisfying F (LA, LB) = 0.

According to the above configuration, since the value of F (LA, LB) can be obtained using the lookup table, the lookup table is created in advance for each type of display device and stored in the storage unit 8 (see FIG. 2). In other words, an appropriate value of F (LA, LB) depending on the type of display device can be obtained.

In the case of LA> LB, it is preferable to perform the interpolation by linear interpolation. This is because interpolation by a straight line is the simplest method as an interpolation method.

In the case of LA <LB, it is also preferable that F (LA, LB) = 0.

In the case of LA <LB, since the gradation level of the display pixel A is low, even when crosstalk occurs between the source line and the first display pixel, the influence of the crosstalk on the display level of the display pixel A Is less. That is, in the case of LA < LB, the correction values F (LA, LB) are not particularly required. Therefore, in the case of LA <LB, it can be said that it is preferable to define F (LA, LB) = 0.

[2-3. About Crosstalk Correction Using Applied Voltage Data]

In addition, in the above description, the write signal gradation to the display pixel A using the input signal gradation level LA of the display pixel A and the gradation (input signal gradation / write signal gradation) level LB of the display pixel B. Although the method for determining the is described, it is not necessary to use this process. That is, the write signal to the display pixel A is based on the analog data indicating the write signal voltage to the display pixel A and the analog data indicating the voltage applied to the display pixel B (input signal voltage and write signal voltage). You may determine the voltage. This correction procedure will be described below. The correction using analog data indicating the applied voltage is performed by the CCT correction circuit in the same manner as the correction using digital data indicating the gray level. However, since analog data indicating the voltage applied to each pixel must be input to the CCT correction circuit, it is necessary to provide the polarity inversion circuit 3 at the front end of the CCT correction circuit as shown in FIG.

In the correction procedure based on analog data indicating the applied voltage, the capacitance value of the display pixel A is Cp, and the parasitic capacitance which connects the source line to which the switching element of the display pixel B is connected and the display pixel A is connected. Value is Csd, the applied voltage (input signal voltage) of the display pixel A when the gradation level is g is U (g), and the applied voltage (input signal voltage or write signal voltage) to the display pixel B is Ugad, common. When the applied voltage to the electrode (the applied voltage of the display pixel A when displaying black) is Ubad, F (g) = Csd · (Ugad-Ubad) / Cp · (U (g + 1) − The correction value F (g) represented by U (g) is calculated as the correction value (write signal gradation) of the display pixel A. The voltage corresponding to the gray level obtained by adding the correction value F (g) and the input signal gray level of the display pixel A is referred to as the write signal voltage of the display pixel A. FIG. In particular, when Csd / Cp is set to a small value of about 0.020, the correction value F (g) can also be made small.

In addition, said Cp adds ccs, Csda, csdb, and Cgd to the liquid crystal capacitance of the display pixel A. FIG. Since the liquid crystal capacitance (capacity value) is dominant, the liquid crystal capacitance may be Cp, and Cp may be added to the liquid crystal capacitance by adding at least one of the capacitances formed in the above Ccs, Csda, Csdb Cgd and the display pixel A.

In addition, when it is necessary to apply the effective value Va of the voltage to the display pixel A in order to display a desired gray scale, the applied voltage (input signal voltage and write signal voltage) to the display pixel B is changed to V (B). The capacitance value of the parasitic capacitance formed between the source line S2 to which the display pixel A is connected and the pixel electrode of the display pixel A, and the pixel of the source line G3 and the display pixel A to which the display pixel B is connected. The parasitic capacitance formed between the electrodes is provided in correspondence with Csdb, the gate line G2 connected to the display pixel A, and the parasitic capacitance formed between the pixel electrode of the display pixel A and Cgd, corresponding to the display pixel A. The capacitance value of the parasitic capacitance formed between the stored storage capacitor electrode Cs and the drain electrode of the switching element of the display pixel A is Ccs, the voltage applied to the gate line G2 is Vg, and the voltage applied to the storage capacitor electrode Cs is Vc. The capacitance of the display pixel A is set to Cp, The voltage V (A) represented by V (A) = (Cp * Va-Cgd * Vg-Csdb * V (B) + Ccs * Vc) / (Cp + Csda) is a write signal for the display pixel A. This is called voltage.

[2-4. About correction of crosstalk using chroma enhancement processing]

As described above, correcting the gradation level of the display pixel A based on the gradation level of the display pixel B has a part in common with the chroma enhancement processing described in Patent Document 2. That is, in Patent Document 2, when the gradation levels of the R color signal, the G color signal, and the B color signal included in the input color video signal are R, G, and B, respectively, the input color video signal,

R '= R + Krg (R-G) + Krb (R-B)

G '= G + Kgr (G-R) + Kgb (G-B)

B '= B + Kbr (B-R) + Kbg (B-G)

(Where Krg, Krb, Kgr, Kgb, Kbr, and Kbg are positive integers or variables that change within a range of zero or more)

It is described that R ', G', and B 'obtained by the operation expressed by P are the gradation levels of the R color signal, the G color signal, and the B color signal, respectively.

In addition, in Patent Document 2, Krg and Krb are changed to be the maximum when R is the halftone level, while R is the minimum when the grayscale level of white or the blackscale level is black, and Kgr and Kgb are G. Is maximum when the gradation level of the halftone is changed, while G is changed to the minimum when the gradation level of the white or the gradation level of the black, and Kbr and Kbg are maximized when B is the gradation level of the halftone, while B It is also described to change to a minimum when is a white gradation level or a black gradation level.

However, the saturation enhancement correction function itself does not take into account interpixel crosstalk. On the other hand, the crosstalk correction function refers to the gradation of adjacent pixels and is the same function as the function used for saturation emphasis. Therefore, when the crosstalk correction of the present invention is added to the conventional correction of chroma enhancement, crosstalk can be reduced at low cost. That is, the improvement of display quality by the appropriate function H (function of chroma enhancement process + crosstalk correction function) of color balance in consideration of both chroma enhancement and crosstalk correction is obtained at the same cost as conventional chroma enhancement.

The process of the titration function H is executed by the saturation emphasis circuit 10 in the color display device 1 of the present embodiment. That is, R, G, B, Krg, Krb, Kgr, Kgb, Kbr, and Kbg in the saturation processing equation are defined as the gradation level LA of the display pixel A, and the gradation level LB of the display pixel B, and By using gradation level LC, F (LA, LB) can be set as follows. In addition, the gradation level LC is the gradation level of display pixels other than the display pixel A and the display pixel B in the display pixel in which the display pixel A and the display pixel B are included.

F (LA, LB) = kLB (LA-LB) + kLC (LA-LC)

(KLB and kLC are functions of LB and LC, respectively, and when MAX is the maximum value of the display gradation level, k (0) = some constant value, k (MAX) = 0, and k (p) become maximum values. p (0> p and p <255) are present).

Thus, since the crosstalk can be reduced in the same process as the conventional saturation emphasis processing, if a program that executes the conventional saturation emphasis processing is executed on a computer inside or outside the display device, the crosstalk can be reduced at low cost. have.

[3. About coloration examples of display panel]

In order to reduce crosstalk more efficiently by using the driving method of the present embodiment, several examples of color schemes for a plurality of display pixels will be described below. In addition, although the following coloration examples 1-3 colorize three colors of RGB to each display pixel, you may display three colors of cyan magenta yellow on each pixel.

(Coloring Example 1: Coloring in Stripe Form)

In the color scheme 1, RGB colors are colored in a stripe form for a plurality of display pixels so as to correspond to the stripes formed by the respective source lines.

Specifically, as shown in Fig. 8, in the display panel 7, it is assumed that a plurality of source lines Si (i is an integer) are arranged so as to be parallel to each other. In this case, in color scheme 1, for example, display colors of a plurality of display pixels are set as follows.

That is, the display pixel included in the display panel 7, for example, the display pixel 11a is set as the first display pixel. In addition, the display pixel 11a is arbitrary among the display pixels included in the display panel 7. The first display pixel includes an array of a plurality of display pixels that are connected to the source line (first source line) S1 to which the display pixel 11a is connected via the switching element 12a, respectively, via the switching element. Set as an array. For example, the display pixels 11b and 11c are connected to the source line S1 via the switching elements 12b and 12c, respectively, and are display pixels constituting the first display pixel array.

The display colors of the plurality of display pixels constituting the first display pixel array are set to any one of three colors of RGB. For example, as shown in Fig. 8, the display color of the display pixels 11a, 11b, 11c constituting the first display pixel array is set to R color.

In addition, the display pixel 11a is connected to the source line (second source line) S2 which is driven by the gate line G1 driving the display pixel 11a and connected via the parasitic capacitance Csd, and is switched through the switching element 12d. 11d of present display pixels are set as a 2nd display pixel. And the array which consists of a some pixel connected via the switching element to the source line S2 with which the display pixel 11d is connected via the switching element 12d is set as a 2nd display pixel array. For example, the display pixels 11e and 11f are each connected to the source line S2 via the switching elements 12e and 12f, and are display pixels constituting the second display pixel array.

For this second display pixel array, any one of two colors except for the display color set for the first display pixel array in three colors of RGB is set as the display color. For example, as shown in Fig. 8, the display color of the display pixels 11d, 11e, 11f constituting the second display pixel array is set to G color.

In addition, on the side opposite to the side where the source line S1 and the source line S2 are adjacent to each other, an array including a plurality of display pixels connected to a source line (third source line) S3 adjacent to the source line S2 via a switching element is provided. It is set as a display pixel array. For example, as shown in Fig. 8, the display pixels 11g, 11h, 11i connected to the source lines S3 through the switching elements 12g, 12h, 12i are respectively display pixels constituting the third display pixel array. .

And about this 3rd display pixel array, the color which is not set as display color with respect to a 1st display pixel array and a 2nd display pixel array among 3 colors of RGB is set as a display color. For example, as shown in Fig. 8, the display color of the display pixels 11g, 11h, 11i constituting the third display pixel array is set to B color.

In addition, the display color of a 1st display pixel array, a 2nd display pixel array, and a 3rd display pixel array is not limited to the above-mentioned example. For example, when the first display pixel array is set to R color, the second display pixel array may be set to B color and the third display pixel array may be set to G color.

According to the above configuration, for example, crosstalk may occur between the display pixel 11a and the display pixel 11d due to the voltage input to the source line S2.

However, in the plurality of display pixels included in the first display pixel array, any one of the RGB colors is set as the display color. Therefore, even when a crosstalk between the display pixel 11a and the display pixel 11d greatly affects the user's time of view occurs, a portion where the same crosstalk occurs is properly distributed in the first display pixel array. You can. Therefore, the crosstalk level seen by the whole color display apparatus can be reduced, and the color balance of the display by a display apparatus can be more optimized.

(Coloring example 2: color of slanted stripes)

In the color scheme 2, any of the RGB colors is colored for the plurality of display pixels as follows. To describe color scheme 2, a first display pixel group consisting of three display pixels included in the display device, and a second display pixel consisting of three display pixels included in the first display pixel group and three other display pixels. The group needs to be set as follows, for example.

That is, the third display pixels included in the first display pixel group are driven by the first gate line and connected to the source lines to which the second display pixels are connected via parasitic capacitance through switching elements. It is set as 3 display pixels, the said 1st display pixel, and the said 2nd display pixel. For example, as shown in Fig. 9, when the display pixel 11a is set as the first display pixel and the display pixel 11d as the second display pixel, it is driven by the gate line (first gate line) G1 and displayed simultaneously. The display pixel 11g connected to the source line S3 to which the pixel 11d is connected via the parasitic capacitance Csd via the switching element 12g is set as the third display pixel.

In this way, a set consisting of three display pixels driven by the same gate line and adjacent to each other in the gate line direction is expressed as a "display pixel" in the claims and the specification. In the case where one pixel is composed of a plurality of sub-pixels, the term "display pixel" in the present specification is a term corresponding to the sub-pixel, and the term "display pixel" in the claims is a term corresponding to an aggregate of sub-pixels. can do.

The display colors of any one of the three colors of RGB are set so that the display pixels 11a, 11d, and 11g are different from one another. For example, as shown in Fig. 9, the display pixel 11a is set to R color, the display pixel 11d is set to G color, and the display pixel 11g is set to B color.

On the other hand, three display pixels included in the second display pixel group,

A source line to which the first display pixel is connected via a switching element, and a fourth display pixel to be connected to the second gate line adjacent to the first gate line through a switching element;

A source line to which the second display pixel is connected via a switching element, a fifth display pixel to be connected to the second gate line via a switching element, and

The third display pixel is set as a source line connected through a switching element and a sixth display pixel connected to the second gate line through a switching element. For example, as described above, when the display pixel 11a is set as the first display pixel, the source line S1 to which the display pixel 11a is connected via the switching element 12a and the gate line G2 adjacent to the gate line G1 are provided. The display pixel 11b connected to the (second gate line) via the switching element 12b is set as the fourth display pixel. Similarly, the display pixel 11e is set as the fifth display pixel, and the display pixel 11h is set as the sixth display pixel.

The same display color as the third display pixel for the fourth display pixel, the same display color as the first display pixel for the fifth display pixel, and the same display color as the second display pixel for the sixth display pixel. Set the display color. That is, as shown in Fig. 9, if R color is set in the display pixel 11a, G color is set in the display pixel 11d, and B color is set in the display pixel 11g, then B color is displayed in the display pixel 11b. R color is set for the pixel 11e and G color is set for the display pixel 11h.

Alternatively, the same display color as the second display pixel for the fourth display pixel, the same display color as the third display pixel for the fifth display pixel, and the same display pixel as the first display pixel for the sixth display pixel. You may set the display color. That is, as shown in Fig. 10, G color may be set for the display pixel 11b, B color for the display pixel 11e, and R color for the display pixel 11h.

In the above example, the example in which the three display pixels included in the first display pixel group are colored in the order of R color, G color, and B color has been described, but the color order is not necessarily limited to this. . For example, you may color in order of R color, B color, and G color.

According to the said structure, the following advantages can be acquired. That is, when crosstalk which greatly affects the user's view occurs between the display pixel 11a and the display pixel 11d, the same crosstalk may occur between two different display pixels.

According to the above configuration, however, the RGB colors are set as the display colors in different order for the three display pixels which are driven on the same source line and included in each of the first display pixel group and the second display pixel group. have. Therefore, the display pixels are uniformly colored without deflecting the color balance of the entire color display device.

Therefore, the point where the crosstalk which affects the time of vision between two pixels other than the display pixel 11a and the display pixel 11d can be disperse | distributed well in a color display apparatus. Therefore, the crosstalk level seen by the whole color display apparatus can be reduced, and the display color balance by a display apparatus can be further optimized.

(Coloring Example 3: Coloration of Rectangular Pattern)

In the color scheme 3, it is necessary to set the first display pixel array, the second display pixel array, and the third display pixel array each consisting of three display pixels. The display pixel array may be set as in Color Scheme 1. For example, as shown in FIG. 11, display pixels 11a, 11b, and 11c are set as display pixels included in the first display pixel array, and display pixels 11d, 11e, and 11f are included in the second display pixel array. What is necessary is just to set as display pixels used, and to set display pixels 11g * 11h * 11i as display pixels contained in 3rd display pixel array.

In the color matching example 3, for the display pixels included in the second display pixel array and the third display pixel array, two colors except for the display color set for the first display pixel array from three colors of RGB are represented by a square pattern. It is set as display color as much as possible. For example, as shown in FIG. 11, in the case where R color is set for the display pixels 11a, 11b, 11c included in the first display pixel array, the display pixels 11d · in the second display pixel array. 11f) and the display pixel 11h in the third display pixel array are set to G color, and the display pixels 11e and the display pixels 11g and 11i in the third display pixel array in the second display pixel array. Set B color for. In addition, you may arrange | position B color and G color on the contrary.

According to the said structure, the following advantages can be acquired. That is, depending on the voltage input to the source line S2, a crosstalk may occur between the display pixel 11a and the display pixel 11d which greatly affects the user's vision.

However, when a plurality of display pixels included in the first display pixel array have any one of the RGB colors set as the display color, even when cross talk occurs that greatly affects the user's vision as described above. The locations where the same crosstalk occurs can be appropriately distributed in the first display pixel array.

In addition, the plurality of display pixels included in the second display pixel array and the third display pixel array are set as the display colors so that two colors of RGB become a rectangular pattern. That is, in the second display pixel array and the third display pixel array, the display pixels are uniformly colored without deflecting the color balance.

Therefore, the locations of crosstalk generated in the second display pixel array and the third display pixel array can be well-balanced in both pixel arrays. Thereby, the display color balance by a display apparatus can be more optimized.

In addition, the second array or the third array may be one color and the other two may be rectangular array.

(Coloring Example 4: Coloring by Four Colors)

In the color scheme 4, for example, R, G, B, and white are the first to fourth display colors, or cyan, magenta, yellow, and green are the first to fourth display colors. In this case, four colors consisting of the first to fourth display colors are assigned to each display pixel. As the basic color matching method, the same method as that of Coloring Examples 1 to 3 can be used.

That is, in the case where four colors are colored using the color matching example 1, a fourth display pixel array is formed as follows. That is, the fourth display pixel array is composed of a plurality of display pixels connected via switching elements to a fourth source line adjacent to the third source line on the side opposite to the side adjacent to the second source line and the third source line. Among the first to fourth display colors, the color that is not set as the display color for the first to third display pixel arrays is set to be the display color of the plurality of display pixels.

For example, if the display panel 7 is configured as shown in Fig. 8, the source line S2 and the source line S3 are connected to the source line (not shown) adjacent to the source line S3 on the side opposite to the adjacent side via a switching element. A plurality of connected display pixels is set as the fourth display pixel array. Then, the fourth display pixel array display color is set to white.

In addition, when coloring four colors using the coloration example 2, it is necessary to set a 1st display pixel group and a 2nd display pixel group as follows. That is, as shown in FIG. 9, four display pixels included in the first display pixel group include:

A third display pixel driven by the first gate line and connected to the source line to which the second display pixel is connected via only parasitic capacitance, via a switching element;

A fourth display pixel driven by the first gate line and connected to the source line to which the third display pixel is connected via only a parasitic capacitance through a switching element,

The first display pixel,

And set as the second display pixel. For example, as shown in Fig. 9, when the display pixel 11a is set as the first display pixel and the display pixel 11d as the second display pixel, it is driven by the gate line (first gate line) G1 and displayed simultaneously. The display pixel 11g connected to the source line S3 to which the pixel 11d is connected via the parasitic capacitance Csd via the switching element 12g is set as the third display pixel. Similarly, the display pixel 11j which is driven by the gate line G1 and is connected via the switching element 12j to the source line S4 to which the display pixel 11g is connected via the parasitic capacitance Csd is set as the fourth display pixel. do.

The display colors of any one of four colors of R, G, B, and white are set so that the display pixels 11a, 11d, 11g, and 11j are different from one another. For example, as shown in Fig. 9, the display pixel 11a is set to R color, the display pixel 11d is set to G color, the display pixel 11g is set to B color, and the display pixel 11j is set to white.

On the other hand, four display pixels included in the second display pixel group,

A source line to which the first display pixel is connected via a switching element, and a fifth display pixel to be connected to a second gate line adjacent to the first gate line through a switching element;

A source line to which the second display pixel is connected via a switching element, a sixth display pixel to be connected to the second gate line via a switching element,

The third display pixel is a source line connected through a switching element, and a seventh display pixel connected to the second gate line through a switching element,

The fourth display pixel is set as a source line connected via a switching element and an eighth display pixel connected to the second gate line via a switching element. For example, as described above, when the display pixel 11a is set as the first display pixel, the source line S1 to which the display pixel 11a is connected via the switching element 12a and the gate line G2 adjacent to the gate line G1 are provided. The display pixel 11b connected to the (second gate line) via the switching element 12b is set as the fifth display pixel. Similarly, the display pixel 11e is set as the sixth display pixel, the display pixel 11h is set as the seventh display pixel, and the display pixel 11k is set as the eighth display pixel.

The same display color as the fourth display pixel for the fifth display pixel, the same display color as the first display pixel for the sixth display pixel, and the same display color as the second display pixel for the seventh display pixel. The display color and the same display color as the third display pixel are set for the eighth display pixel. That is, as shown in Fig. 9, white color is displayed for the display pixel 11b, R color is displayed for the display pixel 11e, G color is displayed for the display pixel 11h, and B color is displayed for the display pixel 11k. Set as.

The same display color as the second display pixel for the fifth display pixel, the same display color as the third display pixel for the sixth display pixel, and the same display pixel as the fourth display pixel for the seventh display pixel. For the display color and the eighth display pixel, the same display color as that of the first display pixel may be set. That is, as shown in FIG. 10, G color is displayed for the display pixel 11b, B color is displayed for the display pixel 11e, white is displayed for the display pixel 11h, and R color is displayed for the display pixel 11k. Set as.

In addition, in the case of coloring four colors using color matching example 3, a fourth display pixel array is formed as follows. That is, a plurality of display pixels connected via switching elements to the fourth source line adjacent to the third source line on the side opposite to the side where the second source line and the third source line are adjacent are set as the fourth display pixel array. .

The display pixels included in the second display pixel array, the third display pixel array, and the fourth display pixel array include the first display color, the second display color, the third display color, and the fourth display. The display color is set so that three colors except for the display color set for the first display pixel array are square patterns.

For example, if the display panel 7 is configured as shown in Fig. 11, the source line S2 and the source line S3 are connected to the source line (not shown) adjacent to the source line S3 on the side opposite to the adjacent side, via a switching element. A plurality of connected display pixels is set as the fourth display pixel array.

The display pixels included in the second display pixel array, the third display pixel array, and the fourth display pixel array include the first display color, the second display color, the third display color, and the fourth display color. The display color is set so that three colors except for the display color set for one display pixel array become a rectangular pattern.

For example, as shown in Fig. 11, when the R color is set for the display pixels 11a, 11b, and 11c included in the first display pixel array, the display pixels 11d to 11f included in the second display pixel array. For the display pixels 11g to 11i included in the third display pixel array and the display pixels (not shown) included in the fourth display pixel array, the display colors are set so that the G, B, and white colors are square patterns. do.

In addition, the "coloring of three colors in a square pattern" means coloring by the same procedure as the coloration example 2 substantially. That is, for example, when three colors of RGB colors are arranged in a rectangular pattern, the display pixels included in the second to fourth display pixel arrays have the same display colors as the display pixels 11a to 11i shown in Figs. Is set. That is, whenever the color of the display pixels adjacent to each other across the gate line is crossed through the gate line, the RGB, BRG, GBR,... To change to (see FIG. 9). In addition, each time the gate line is crossed, the RGB, RGB, BRG,... To change to (see FIG. 10).

Thus, it is also possible to colorize four colors with respect to a some display pixel by the substantially same method as coloration example 1-coloration example 3. In addition, even if four colors are colored in this manner, the same effects as in Color Schemes 1 to 3 can be obtained.

〔4. Connection form between source line and display pixel]

In order to reduce crosstalk more efficiently by using the driving method of the present embodiment, two examples are described below with respect to the connection form between the source line and the display pixel. In addition, the following connection example 1 and connection example 2 are applicable to any of the above-mentioned coloration examples 1-4.

(Connection example 1: L-shaped section)

In the connection example 1, each source line contained in a source line is provided in the shape connected so that the L-shaped part and the reverse L-shaped part may be alternately repeated. That is, as shown in FIG. 12, the source line S1 is provided in the shape connected so that the L-shaped part S1a and the reverse L-shaped part S1b may be alternately repeated. Similarly, the source line S2 is provided such that the L-shaped section S2a and the reverse L-shaped section S2b are alternately repeated so that the L-shaped section S3a and the reverse L-shaped section S3b are alternately repeated.

In FIG. 12, the parasitic capacitance formed between the source line S2 and the display pixel connected to the inverted L-shaped portion S1b is longer than the display pixel connected to the L-shaped portion S1a. Will grow. Therefore, the color balance of the display panel is concentrated by concentrating a large crosstalk to a B color having low visibility by arranging the G colors and the B colors in a square pattern with respect to the plurality of display pixels connected to the gate lines S2 and the gate lines S3. May be optimized.

(Connection example 2: Connected to invert each time the gate line is crossed)

In the connection example 2, the direction in which the switching element is connected to each source line included in the plurality of source lines is set to be different each time the respective gate lines included in the plurality of gate lines are crossed. That is, as shown in Fig. 13, the switching element 12d connected to the source line S2 is connected to the display pixel 11d on the right side as seen from the source line S2. Similarly to the switching element 12d, the switching element 12b connected to the source line S2 is connected to the display pixel 11b on the left side as viewed from the source line S2.

Similarly with respect to the other source lines S1 and S3, the connection direction of the switching elements to the source lines is determined by the gate lines G1, G2, G3. Every time you go, right, left, right,… It is set to be.

According to Connection Example 1 and Connection Example 2 described above, the following effects can be obtained. That is, crosstalk occurs between the parasitic capacitance and the display pixel, that is, between the source line and the display pixel. Therefore, when each source line is provided so that it may become parallel with each other, the location where crosstalk generate | occur | produces may continue linearly along a source line, and color balance may collapse.

However, according to the said structure, each source line is provided in the shape connected so that the L-shaped part and the reverse L-shaped part may be alternately repeated. That is, deflection occurs in the parasitic capacitance formed between each display pixel and each source line. Therefore, the point where cross talk generate | occur | produces can be disperse | distributed suitably in a display apparatus. Thereby, the color balance of the display by a display apparatus can be optimized more.

[5. About program]

In the above description, the case where the CCT correction circuit 2 or the saturation emphasis circuit 10 is realized only by hardware has been described as an example, but the present invention is not limited thereto. All or part of the members may be implemented as a combination of a program for realizing the above functions and a hardware (computer) for executing the program. As an example, the CCT correction circuit 2 or the chroma enhancement circuit 10 can be realized as a device driver used when driving the display panel 7 by a computer connected to the color display device 1. As the conversion substrate attached to the outside of the color display device 1, the CCT correction circuit 2 or the saturation emphasis circuit 10 is realized, and the CCT correction circuit 2 or the saturation emphasis is rewritten by a program such as software. In the case where the operation of the circuit for realizing the circuit 10 can be changed, the software is distributed and the operation of the circuit is changed according to the CCT correction circuit 2 or the saturation emphasis circuit of the above embodiment. 10).

In such a case, if hardware capable of performing the above functions is provided, the CCT correction circuit 2 or the saturation emphasis circuit 10 according to the embodiment can be realized by simply executing the program on the hardware. .

As described above, in the present driving method,

Cp, the capacitance of the first display pixel

Csd, the capacitance value of the parasitic capacitance formed between the source line to which the second display pixel is connected and the pixel electrode of the first display pixel,

The input signal voltage to the first display pixel when the level of the input signal gradation is g is U (g),

An input signal voltage or a write signal voltage to the second display pixel is Ugad,

When the voltage applied to the common electrode opposite to each display pixel is Ubad,

The correction gradation F (g) represented by F (g) = Csd · (Ugad-Ubad) / Cp · (U (g + 1) -U (g)) plus the input signal gradation to the first display pixel It is preferable to set the write signal gradation to the first display pixel.

or,

If an effective voltage Va is required to display a desired gray scale on the first display pixel,

An input signal voltage or a write signal voltage for the second display pixel is V (B),

Csda, the capacitance value of the parasitic capacitance formed between the source line to which the first display pixel is connected and the pixel electrode of the first display pixel,

Csdb, the capacitance value of the parasitic capacitance formed between the source line to which the second display pixel is connected and the pixel electrode of the first display pixel,

Cgd, the capacitance value of the parasitic capacitance formed between the gate line connected to the first display pixel and the pixel electrode of the first display pixel,

Ccs, the capacitance value of the parasitic capacitance formed between the storage capacitor electrode provided corresponding to the first display pixel and the first display pixel,

Vg applied to the gate line,

The voltage applied to the storage capacitor electrode is Vc,

The capacitance of the first display pixel is set to Cp,

The voltage V (A) represented by V (A) = (Cp * Va-Cgd * Vg-Csdb * V (B) + Ccs * Vc) / (Cp + Csda) is the write signal voltage to the first display pixel. You may make it.

In addition, the driving method of the display device of the present invention is a driving method of a display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of a portion where a plurality of gate lines and a plurality of source lines cross each other. Source lines for forming parasitic capacitance between the pixel electrodes of the first display pixel and at the same time as the source lines connected to the first display pixel with respect to the first display pixel and the second display pixel connected to the same gate line; Being connected to the second display pixel,

When the function of setting the level of the input signal gradation to the first display pixel as LA and the level of the input signal gradation to the other second display pixel as LB and the LA and the LB as input values is F (LA, LB),

The write signal voltage to the first display pixel is set so that the level Lout of the write signal gradation to the first display pixel becomes the gradation level calculated by Lout = LA + F (LA, LB). The input signal voltage is a voltage corrected based on the input signal voltage to the second display pixel or the write signal voltage to the second display pixel.

According to the above configuration, the write voltage signal to the first display pixel is corrected based on the input signal voltage or the write voltage signal to the second display pixel. In this way, the parasitic capacitance between the pixel electrode of the first display pixel and the source line for driving the second display pixel is considered in advance, and then the write signal for the first display pixel is determined, whereby The gap (cross talk amount) between the display gradation and the desired gradation generated by varying the potential of the pixel electrode can be greatly reduced, and the display quality can be improved.

In addition, since analog data indicating a signal voltage does not linearly respond to digital data indicating a gradation level, a large number of bits are required for processing of analog data. That is, a process of correcting the signal gradation to the first display pixel using the gradation level as the digital data is more effective than a process of correcting the signal voltage to the first display pixel using the data itself of the signal voltage as analog data. Simple.

Therefore, according to the said structure, the color balance of a display apparatus can be optimized by a simple process.

In the driving method of the above configuration, when LA is smaller than a predetermined threshold, F (LA, LB) = k (LA-LB) is defined (where k> 0), and when LA is larger than a threshold. , F (LA, LB) is preferably defined as a function for outputting a constant value.

In other words, the values of the correction values F (LA, LB) given to the LA in order to reduce the cross talk increase monotonously in accordance with the value of LA until the LA reaches a predetermined threshold. In addition, for LA exceeding the threshold, there is no clear correlation between LA and F (LA, LB), and the error rate of the stimulus value is lowered. Therefore, relatively rough correction is performed by adding a constant value to LA and outputting Lout. This reduces cross talk.

Therefore, defining F (LA, LB) as described above provides a new effect that Lout can be obtained by a simple process.

In the above-described driving method, a plurality of integers are extracted from the integers included in the maximum gradation level from 0, and the values of F (LA, 0) in the case where each of the plurality of constants is LA are corresponding LA. The value of F (LA, LB), which is stored in the lookup table in advance in relation to the value of, and takes LA, which is not stored in the lookup table, as the value of LA stored in the lookup table, and the value of the LA It is preferable to interpolate based on the value of F (LA, 0) corresponding to and the values of LA and LB satisfying F (LA, LB) = 0.

According to the above configuration, since the value of F (LA, LB) can be obtained using the lookup table, if the lookup table is created in advance for each type of display device, the appropriate F (LA, LB) according to the type of display device is obtained. Can be found.

Therefore, a new effect is provided that the color balance can be optimized by reducing the crosstalk regardless of the type of the display device.

Moreover, in the drive method of the said structure, in the case of LA> LB, it is preferable to perform the said interpolation by linear interpolation.

That is, as the interpolation method, since the interpolation by a straight line is the simplest method, according to the above structure, a new effect can be obtained by obtaining a simple F (LA, LB) value according to the type of display device by a simple process. .

Moreover, in the driving method of the said structure, when LA <LB, it is preferable to define F (LA, LB) = 0.

That is, in the case of LA <LB, since the gradation level of the first display pixel is low, the crosstalk affects the display level of the first display pixel even when a crosstalk occurs between the source line and the first display pixel. Is less. That is, in the case of LA < LB, the correction values F (LA, LB) are not particularly required.

Thereby, according to the said structure, crosstalk can be reduced by simpler process.

In addition, in the present invention, in the method of driving a display device in which display pixels including a switching element and a pixel electrode are disposed corresponding to each of a portion where a plurality of gate lines and a plurality of source lines cross each other, Pixel electrodes of the first display pixel that are connected to and are adjacent to the source line connected to the first display pixel for the first to third display pixels that respectively display the first, second, and third display colors. A source line forming a parasitic capacitance between the second display pixel and the source line connected to the second display pixel and adjacent to the source line connected to the second display pixel and between the pixel electrode of the second display pixel. The source line forming the? Is connected to the third display pixel, and the input signal gray level of the first display pixel is LA, and the input signal gray level or the write signal gray level of the second display pixel is LB. When the input signal gray level or the write signal gray level of the third display pixel is LC,

G (LA, LB, LC) = kLB (LA-LB) + kLC (LA-LC) (where kLB and kLC are the functions of LB and LC, respectively. k (0) = some constant value, k (MAX) = 0, and the correction gradation G (LA, LB, LC) represented by p (0 <p <255) exists where k (p) becomes the maximum value. The gray level obtained by adding the input signal gray LA of the first display pixel may be referred to as the write signal gray level of the first display pixel.

Moreover, in the driving method of the said structure, it is possible to use R color as a 1st display color, G color as a 2nd display color, and B color as a 3rd display color.

According to the above arrangement, since the crosstalk can be reduced in the same processing as the conventional chroma enhancement processing, if a program for executing the conventional chroma enhancement processing is executed on a computer inside or outside the display device, the crosstalk can be performed at low cost. Can be reduced.

In the display device of the above configuration, the plurality of source lines are provided so as to be parallel to each other, and display pixels for displaying the first display color, display pixels for displaying the second display color, and third display. It is preferable that image display is performed using display pixels composed of display pixels for displaying colors, and the following first display pixel array, second display pixel array, and third display pixel array are included.

First, a first display pixel array is formed of a plurality of display pixels connected via a switching element to a first source line to which the first display pixel is connected via a switching element. Any one of the two display colors and the third display color is set as the display color.

Further, the second display pixel array is formed of a plurality of display pixels connected via a switching element to a second source line to which the second display pixel is connected via a switching element. Any one of two colors except for the display color set for the first display pixel array among the two display colors and the third display color is set as the display color.

The third display pixel array may include a plurality of display pixels connected to a third source line adjacent to the second source line through a switching element on a side opposite to a side where the first source line and the second source line are adjacent to each other. At the same time, a color which is not set as the display color for the first display pixel array and the second display pixel array in the first display color, the second display color, and the third display color is used as the display color. Configure as set.

As described above, the method of providing the first to third display pixel arrays and setting the first to third display colors is used as a general method for colorizing a plurality of display pixels in the display device. According to the above configuration, it is possible to reduce the level of crosstalk generated in the general display device and to optimize the color balance of the display by the display device.

In addition, in the display device having the above configuration, the display pixel may include a display pixel for displaying a fourth display color and further include the following fourth display pixel array. That is, a plurality of display pixels are connected to a fourth display pixel array through a switching element to a fourth source line adjacent to the third source line on the side opposite to the side adjacent to the second source line and the third source line. At the same time, the fourth display color can be configured as the display color.

In addition, the display device of the above configuration is provided so that the plurality of source lines are parallel to each other, and at the same time, the display pixel for displaying the first display color, the display pixel for displaying the second display color, and the third display color. Perform image display using display pixels composed of display pixels to display, and differ from the first display pixel group consisting of three display pixels included in the display device, and the three display pixels included in the first display pixel group. For the second display pixel group consisting of three display pixels, it can be set as follows.

First, three display pixels included in the first display pixel group are driven by the first gate line and connected to a source line to which the second display pixel is connected via parasitic capacitance through a switching element. It consists of three display pixels, a said 1st display pixel, and the said 2nd display pixel. In addition, for the first display pixel, the second display pixel, and the third display pixel, a display color of any one of the first display color, the second display color, and the third display color. Set them to be different.

Three display pixels included in the second display pixel group include:

A source line to which the first display pixel is connected via a switching element, and a fourth display pixel to be connected to the second gate line adjacent to the first gate line through a switching element;

A source line to which the second display pixel is connected via a switching element, a fifth display pixel to be connected to the second gate line via a switching element, and

The third display pixel is configured as a source line connected via a switching element and a sixth display pixel connected to the second gate line via a switching element.

And the same display color as the third display pixel for the fourth display pixel, the same display color as the first display pixel for the fifth display pixel, and the same display color as the second display pixel for the sixth display pixel. Set the display color. The same display color as the second display pixel for the fourth display pixel, the same display color as the third display pixel for the fifth display pixel, and the same display color as the first display pixel for the sixth display pixel. Set the display color.

According to the above structure, the following new effects are realized. In other words, when crosstalk occurs that greatly affects the user's vision between the second display pixel and the first display pixel, the same crosstalk may occur between two different display pixels.

According to the above configuration, however, the first display color and the third display color are different from three display pixels which are driven in the same source line and included in each of the first display pixel group and the second display pixel group. The order is set as the display color. Therefore, display pixels are uniformly colored without biasing the color balance of the entire display device.

Thereby, the location where the crosstalk which affects a time | occurence between two pixels other than a 1st display pixel and a 2nd display pixel generate | occur | produces can be disperse | distributed in the display apparatus in good balance. Therefore, a new effect is realized that the crosstalk level seen by the entire display device can be reduced, and the color balance of the display by the display device can be further optimized.

In addition, the display device of the above configuration is provided such that the plurality of source lines are parallel to each other, and a display pixel for displaying a first display color, a display pixel for displaying a second display color, and a third display color. A first display pixel group consisting of four display pixels included in the display device by performing image display using a display pixel composed of a display pixel for displaying a display pixel and a display pixel for displaying a fourth display color, and a first display pixel. The second display pixel group including four display pixels different from the four display pixels included in the display pixel group may be set as follows.

That is, a fourth display pixel included in the first display pixel group is connected to a source line driven by the first gate line and connected to a source line to which the second display pixel is connected only through parasitic capacitance. 3 display pixels,

A fourth display pixel driven by the first gate line and connected to the source line to which the third display pixel is connected via only a parasitic capacitance through a switching element,

The first display pixel, and

It is configured as the second display pixel.

The first display pixel, the second display pixel, the third display pixel, and the fourth display pixel may include the first display color, the second display color, the third display color, and the fourth display pixel. The display colors of any one of the four display colors are set to be different from each other.

In addition, four display pixels included in the second display pixel group include:

A source line to which the first display pixel is connected via a switching element, and a fifth display pixel to be connected to a second gate line adjacent to the first gate line through a switching element;

A source line to which the second display pixel is connected via a switching element, a sixth display pixel to be connected to the second gate line via a switching element,

The third display pixel is a source line connected through a switching element, and a seventh display pixel connected to the second gate line through a switching element,

The fourth display pixel is configured as a source line connected via a switching element and an eighth display pixel connected to the second gate line via a switching element.

The same display color as the fourth display pixel for the fifth display pixel, the same display color as the first display pixel for the sixth display pixel, and the same display pixel as the second display pixel for the seventh display pixel. The display color and the same display color as those of the third display pixel are set for the eighth display pixel. The same display color as the second display pixel for the fifth display pixel, the same display color as the third display pixel for the sixth display pixel, and the same display pixel as the fourth display pixel for the seventh display pixel. For the display color and the eighth display pixel, the same display color as the first display pixel is set.

According to the above structure, the following new effects are realized. In other words, when crosstalk occurs that greatly affects the user's vision between the second display pixel and the first display pixel, the same crosstalk may occur between two different display pixels.

However, according to the above structure, the first display color to the fourth display color differ in order from four display pixels driven at the same source line and included in each of the first display pixel group and the second display pixel group. It is set as the display color by. Therefore, the display pixels are uniformly colored without deflecting the color balance of the entire display device.

Thereby, the point where the crosstalk which affects a time | occurence between two pixels other than a 1st display pixel and a 2nd display pixel generate | occur | produces can be disperse | distributed in the display apparatus in good balance. Therefore, a new effect can be realized in which the crosstalk level seen by the entire display device can be reduced, and the color balance of the display by the display device can be further optimized.

In addition, the display device of the present invention is provided so that the plurality of source lines are parallel to each other, and the display pixel for displaying the first display color, the display pixel for displaying the second display color, and the third display color. Image display is performed using display pixels composed of display pixels to be displayed, and a first display pixel array, a second display pixel array, and a third display pixel array set as follows can be included.

First, a first display pixel array is formed of a plurality of display pixels connected via a switching element to a first source line to which the first display pixel is connected via a switching element. Any one of the two display colors and the third display color is set as the display color.

The second display pixel array is constituted of a plurality of display pixels that are connected via a switching element to a second source line to which the second display pixel is connected via a switching element.

The third display pixel array may include a plurality of display pixels connected to a third source line adjacent to the second source line through a switching element on a side opposite to a side where the first source line and the second source line are adjacent to each other. It consists of what consists of.

The display pixels included in the second display pixel array and the third display pixel array are set with respect to the first display pixel array in the first display color, the second display color, and the third display color. The display color is set so that two colors except the display color become a square pattern.

In the above configuration, for example, cross talk may occur between the first display pixel and the second source line, which greatly affects the user's time, due to the voltage input to the second source line.

In the present invention, however, any one of the first display color to the third display color is set as the display color of the plurality of display pixels included in the first display pixel array, thereby greatly increasing the user's time as described above. Even when the crosstalk affects, the location where the same crosstalk occurs can be properly distributed in the first display pixel array.

In addition, the plurality of display pixels included in the second display pixel array and the third display pixel array are set as the display colors so that two colors are a rectangular pattern among the first to third display colors. That is, in the second display pixel array and the third display pixel array, the display pixels are uniformly colored without biasing the color balance.

Therefore, the locations of crosstalk generated in the second display pixel array and the third display pixel array can be well-balanced in both pixel arrays. This realizes a new effect that can further optimize the color balance of the display by the display device.

In addition, the display device having the above-described configuration may be configured as the display pixel including the display pixel for displaying the fourth display color and further including the following fourth display pixel array.

That is, the fourth display pixel array includes a plurality of display pixels connected to the fourth source line adjacent to the third source line via a switching element on the side opposite to the side adjacent to the second source line and the third source line. It consists of what consists of. In addition, the display pixels included in the second display pixel array, the third display pixel array, and the fourth display pixel array include the first display color, the second display color, the third display color, and the The display color may be set such that three colors other than the display color set for the first display pixel array in the fourth display color become a rectangular pattern.

In addition, in the display device of the above structure, R color can be used as the first display color, G color as the second display color, and B color as the third display color. Cyan may be used as the first display color, magenta may be used as the second display color, and yellow may be used as the third display color. As the fourth display color, either white or green can be used.

In the display device of the above configuration, it is preferable that each of the source lines included in the plurality of source lines is provided in such a manner that the L-shaped portions and the reverse L-shaped portions are alternately repeated. It is also preferable that the direction in which the switching elements are connected to each of the source lines included in the plurality of source lines is set to be different each time the respective gate lines are included in the plurality of gate lines.

As described above, crosstalk occurs between the parasitic capacitance and the display pixel, that is, between the source line and the display pixel. Therefore, when each source line is provided so as to be parallel to each other, the point where crosstalk generate | occur | produces continues linearly along a source line, and color balance may collapse.

However, according to the said structure, each source line is provided in the shape connected so that the L-shaped part and the reverse L-shaped part may be alternately repeated. In addition, the direction in which the switching elements are connected is set to be different each time the gate lines are crossed. Therefore, the point where cross talk generate | occur | produces can be disperse | distributed suitably in a display apparatus. Thereby, the color balance of the display by a display apparatus can be optimized more.

The program of the present invention is characterized in that the computer executes the above-mentioned driving method. By executing the program on a computer, the same effects as in the driving method of the present invention can be obtained.

Further, in the driving method of the display device of the present invention, in the driving method of the display device in which the display pixels and the switching elements are arranged so as to correspond to each of the portions where the plurality of gate lines and the plurality of source lines cross each other, the first display is performed. The voltage applied to the pixel is corrected based on the voltage applied to another second display pixel, while the second display pixel is driven by the same gate line as the first gate line that drives the first display pixel. The source line to which the second display pixel is connected via the switching element may be the same as the source line to which the first display pixel is connected via the parasitic capacitance.

At this time, when the capacitance value of the first display pixel is Cp, the source line to which the switching element of the second display pixel is connected and the parasitic capacitance value to connect the first display pixel are Csd, and the gradation level is g. When the voltage applied to the display pixel is U (g), the voltage applied to the second display pixel is Ugad, and the voltage applied to the first display pixel is Ubad when displaying black, F (g) = Csd It is also possible to output the correction value F (g) represented by (Ugad-Ubad) / Cp · (U (g + 1) -U (g)) as the correction gradation of the first display pixel.

Further, in order to display a desired gray scale, an effective value of a voltage applied to the first display pixel is Va, a voltage applied to the second display pixel is V (B), and a source to which the switching element of the first display pixel is connected. Csda the capacitance value of the parasitic capacitance connecting the line and the first display pixel, Csdb the parasitic capacitance of the source line connected the switching element of the second display pixel and the first display pixel, and the first display. Cgd, the capacitance value of the parasitic capacitance connecting the gate line for driving the pixel and the first display pixel, Ccs, the capacitance value of the parasitic capacitance connecting the common electrode and the first display pixel provided corresponding to the first display pixel, and the gate. When the voltage applied to the line is Vg, the voltage applied to the common electrode is Vc, and the capacitance of the first display pixel is Cp, V (A) = (Cp * Va-Cgd * Vg-Csdb * V ( Represented by B) + Ccs * Vc) / (Cp + Csda) The voltage V (A), it is also possible to be applied to the first display pixel.

Further, in the driving method of the display device of the present invention, in the driving method of the display device in which the display pixels and the switching elements are arranged so as to correspond to each of the portions where the plurality of gate lines and the plurality of source lines cross each other, the first display is performed. When the gray scale level input to the pixel is LA and the gray scale level input to another second display pixel is LB, the LA and the LB are input values, F (LA, LB). The voltage applied to the first display pixel is corrected based on the voltage applied to the second display pixel so that the input gradation level is corrected to the gradation level Lout calculated at Lout = LA + F (LA, LB). On the other hand, the second display pixel is driven by the same gate line as the first gate line driving the first display pixel, and the source line to which the second display pixel is connected via the switching element is First sign The pixel can be the same as the source line to which it is connected via parasitic capacitance.

In the display device of the present invention, a display pixel and a switching element are disposed so as to correspond to each of a portion where a plurality of gate lines and a plurality of source lines cross each other, and a second voltage having a different applied voltage to the first display pixel. The second display pixel is corrected based on the voltage applied to the display pixel, and the second display pixel is driven by the same gate line as the first gate line for driving the first display pixel, and the second display pixel is switched. The source lines connected through the same may be the same as the source lines to which the first display pixel is connected through the parasitic capacitance.

According to the present invention, in a display device in which a display pixel is driven using a plurality of source lines and a plurality of gate lines, crosstalk between two display pixels can be reduced. Therefore, this invention is suitable for improving the color reproducibility of a display apparatus, especially a liquid crystal display device.

1 is a plan view showing in detail the configuration of a display panel in the color display device of FIG.

2 is a block diagram illustrating a configuration of a color display device according to an exemplary embodiment of the display device of the present invention.

3 is a view illustrating a state in which a display pattern is changed in the display panel of FIG. 1.

4 is a diagram for contrasting original brightness with synthetic brightness.

Fig. 5 is a graph showing the relationship between the error rate of the stimulus value of the synthesized luminance and the display gray scale with respect to the original luminance.

6 is a graph in which the relationship between the correction gradation level and the display gradation is plotted.

FIG. 7 is a graph showing the relationship between the display gradation level LA and the stimulus error rate when the correction gradation level of FIG. 6 is added to the gradation level of the display pixel A. FIG.

FIG. 8 is a plan view illustrating a state in which the display panel of FIG. 1 is colored by using color scheme 1; FIG.

FIG. 9 is a plan view illustrating a state in which the display panel of FIG. 1 is arranged using color scheme 2; FIG.

FIG. 10 is a plan view illustrating a state in which the display panel of FIG. 1 is arranged using color scheme 2; FIG.

FIG. 11 is a plan view illustrating a state in which the display panel of FIG. 1 is arranged using color scheme 3.

FIG. 12 is a plan view illustrating a state in which source lines and display pixels are connected to each other in the display panel of FIG. 1 using connection example 1. FIG.

FIG. 13 is a plan view illustrating a state in which source lines and display pixels are connected in the display panel of FIG. 1 using connection example 2. FIG.

14 is a block diagram showing a configuration of a color display device according to another embodiment of the display device of the present invention.

Fig. 15A is a diagram showing the configuration of a display panel in a conventional liquid crystal display, and Fig. 15B is a diagram showing a state in which a voltage is applied to a gate line.

16A and 16B are block diagrams showing the processing steps of the CCT correction circuit of the present invention.

Fig. 17 is a block diagram showing a processing process of another CCT correction circuit of the present invention.

Claims (28)

A driving method of a display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of a portion where a plurality of gate lines and a plurality of source lines cross each other. Source lines for forming parasitic capacitance between the first display pixel and the second display pixel connected to the same gate line and adjacent to the source line connected to the first display pixel and between the pixel electrodes of the first display pixel. This is connected to the second display pixel, Wherein the write signal to the first display pixel is a signal corrected based on the input signal to the second display pixel or the write signal to the second display pixel. Method of driving the device. The display device of claim 1, wherein the capacitance value of the first display pixel is Cp; Csd, the capacitance value of the parasitic capacitance formed between the source line to which the second display pixel is connected and the pixel electrode of the first display pixel, The input signal voltage to the first display pixel when the level of the input signal gradation is g is U (g), An input signal voltage or a write signal voltage to the second display pixel is Ugad, When the voltage applied to the common electrode opposite to the pixel electrode of each display pixel is Ubad, The correction gradation F (g) represented by F (g) = Csd · (Ugad-Ubad) / Cp · (U (g + 1) -U (g)) plus the input signal gradation to the first display pixel And a write signal gradation to the first display pixel. The method according to claim 1, wherein when an effective voltage Va is required to display a desired gray scale on the first display pixel, The input signal voltage or the write signal voltage for the second display pixel is V (B), Csda, the capacitance value of the parasitic capacitance formed between the source line to which the first display pixel is connected and the pixel electrode of the first display pixel, Csdb, the capacitance value of the parasitic capacitance formed between the source line to which the second display pixel is connected and the pixel electrode of the first display pixel, Cgd, the capacitance value of the parasitic capacitance formed between the gate line connected to the first display pixel and the pixel electrode of the first display pixel, The capacitance value of the parasitic capacitance formed between the storage capacitor electrode provided corresponding to the first display pixel and the first display pixel Ccs, The applied voltage to the gate line is Vg, The applied voltage to the storage capacitor electrode is Vc, Let Cp be the capacitance of the first display pixel, The voltage V (A) represented by V (A) = (Cp * Va-Cgd * Vg-Csdb * V (B) + Ccs * Vc) / (Cp + Csda) is the write signal voltage to the first display pixel. A driving method of a display device, characterized in that. A driving method of a display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of a portion where a plurality of gate lines and a plurality of source lines cross each other. Source lines for forming parasitic capacitance between the first display pixel and the second display pixel connected to the same gate line and adjacent to the source line connected to the first display pixel and between the pixel electrodes of the first display pixel. This is connected to the second display pixel, When a function of setting the level of the input signal gradation to the first display pixel as LA and the level of the input signal gradation to the other second display pixel as LB, the LA and the LB as input values is F (LA, LB), The write signal voltage to the first display pixel is converted into the input signal of the first display pixel such that the level Lout of the write signal gradation to the first display pixel becomes the gradation level calculated by Lout = LA + F (LA, LB). A voltage is a voltage corrected based on an input signal voltage to a second display pixel or a write signal voltage to a second display pixel. 5. The method of claim 4, wherein when LA is smaller than a predetermined threshold, F (LA, LB) = k (LA-LB) is defined (where k> 0), And when LA is greater than a threshold, F (LA, LB) is defined as a function for outputting a predetermined value. The method according to claim 4, wherein a plurality of integers are extracted from the integers included in the maximum gradation level from 0, and when each of the plurality of integers is LA, the value of F (LA, 0) is set to the value of the corresponding LA. Relate them to a lookup table in advance, The value of F (LA, LB) that takes an LA that is not stored in the lookup table, the value of LA stored in the lookup table, the value of F (LA, 0) corresponding to the value of LA, and F (LA). And interpolation based on values of LA and LB satisfying (LB) = 0. 7. The method of driving a display device according to claim 6, wherein in the case of LA > LB, the interpolation is performed by linear interpolation. The method of claim 4, wherein when LA <LB, F (LA, LB) = 0. A driving method of a display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of a portion where a plurality of gate lines and a plurality of source lines cross each other. 1st display pixel connected to the same gate line and adjacent to the source line connected to a 1st display pixel with respect to the 1st-3rd display pixel which respectively displays a 1st, 2nd, 3rd display color A source line which forms a parasitic capacitance between the pixel electrodes of is connected to the second display pixel and is adjacent to the source line connected to the second display pixel and between the pixel electrode of the second display pixel. The source line forming the parasitic capacitance is connected to the third display pixel, When the input signal gray level of the first display pixel is LA, the input signal gray level or the write signal gray level of the second display pixel is LB, and the input signal gray level or the write signal gray level of the third display pixel is LC. G (LA, LB, LC) = kLB (LA-LB) + kLC (LA-LC) (where kLB, kLC is a function of LB and LC, respectively. (0) = any constant value, k (MAX) = 0, where k (p) is the maximum value of p (0 <p <255). A gradation obtained by adding the input signal gradation LA of one display pixel to the write signal gradation of the first display pixel. 10. The method of driving a display device according to claim 9, wherein the first display color is an R color, the second display color is a G color, and the third display color is a B color. A display device in which a display pixel and a switching element are disposed so as to correspond to each of a portion where a plurality of gate lines and a plurality of source lines cross each other. The first and second display pixels are driven by the same first gate line, and the first display pixels are connected via parasitic capacitance to a source line to which the second display pixels are connected via a switching element. And the write signal to the first display pixel is a signal corrected based on the input signal to the second display pixel or the write signal to the second display pixel. The method of claim 11, wherein the plurality of source lines are provided to be parallel to each other, Image display is performed using a display pixel composed of a display pixel displaying a first display color, a display pixel displaying a second display color, and a display pixel displaying a third display color, A first display pixel array, a second display pixel array, and a third display pixel array, these being as follows, i.e. The first display pixel array is composed of a plurality of display pixels connected via a switching element to a first source line to which the first display pixel is connected via a switching element, and also includes a first display color, a second display color, and Any one of the third display colors is set as the display color, The second display pixel array is composed of a plurality of display pixels connected via a switching element to a second source line to which the second display pixel is connected via a switching element, and at the same time, the first display color, the second display color, and Any one of two colors except the display color set for the first display pixel array among the third display colors is set as the display color, The third display pixel array is composed of a plurality of display pixels connected via switching elements to a third source line adjacent to the second source line on the side opposite to the side where the first source line and the second source line are adjacent to each other. A display device, wherein a color which is not set as the display color for the first display pixel array and the second display pixel array among the first display color, the second display color, and the third display color is set as the display color. The display pixel according to claim 12, further comprising a display pixel that displays a fourth display color, And a fourth display pixel array, which is as follows, i.e. The fourth display pixel array is The second display line is composed of a plurality of display pixels connected to the fourth source line adjacent to the third source line via a switching element on the opposite side to the adjacent side, and the fourth display color is used as the display color. A display device, which is set. The method of claim 11, wherein the plurality of source lines are provided to be parallel to each other, Image display is performed using a display pixel composed of a display pixel displaying a first display color, a display pixel displaying a second display color, and a display pixel displaying a third display color, Regarding the first display pixel group composed of three display pixels included in the display device, and the second display pixel group composed of three display pixels different from the three display pixels included in the first display pixel group, In other words, Three display pixels included in the first display pixel group include: A third display pixel, a first display pixel, and a second display pixel which are driven by a first gate line and are connected via switching elements to a source line to which the second display pixel is connected via a parasitic capacitance, For the first display pixel, the second display pixel, and the third display pixel, the display colors of any one of the first display color, the second display color, and the third display color are set to be different from each other, Three display pixels included in the second display pixel group include: A source line to which the first display pixel is connected via the switching element, and a fourth display pixel to be connected to the second gate line adjacent to the first gate line via the switching element, A source line to which the second display pixel is connected via the switching element, a fifth display pixel to the second gate line via the switching element, and A third display pixel is a source line connected via a switching element, and a sixth display pixel connected to a second gate line via a switching element, The same display color as the third display pixel for the fourth display pixel, the same display color as the first display pixel for the fifth display pixel, and the same display color as the second display pixel for the sixth display pixel are set. Display device. The method of claim 11, wherein the plurality of source lines are provided to be parallel to each other, By using a display pixel composed of a display pixel for displaying a first display color, a display pixel for displaying a second display color, a display pixel for displaying a third display color, and a display pixel for displaying a fourth display color. Image display is performed, For the first display pixel group composed of four display pixels included in the display device, and the second display pixel group composed of four display pixels different from the four display pixels included in the first display pixel group, as follows: In other words, Four display pixels included in the first display pixel group include: A third display pixel driven by the first gate line and connected to the source line to which the second display pixel is connected via only parasitic capacitance through a switching element, A fourth display pixel driven by the first gate line and connected to the source line to which the third display pixel is connected via only parasitic capacitance through a switching element, A first display pixel, and Second display pixel, For the first display pixel, the second display pixel, the third display pixel, and the fourth display pixel, any one of the first display color, the second display color, the third display color, and the fourth display color is used. The display colors are set to be different from each other, Four display pixels included in the second display pixel group include: A source line to which the first display pixel is connected through the switching element, and a fifth display pixel to be connected to the second gate line adjacent to the first gate line through the switching element, A source line to which the second display pixel is connected via the switching element, a sixth display pixel to which the second gate line is connected via the switching element, A third display pixel is a source line connected via a switching element, and a seventh display pixel connected to a second gate line via a switching element, A fourth display pixel is a source line connected via a switching element, and an eighth display pixel connected to a second gate line via a switching element, The same display color as the fourth display pixel for the fifth display pixel, the same display color as the first display pixel for the sixth display pixel, the same display color as the second display pixel for the seventh display pixel, and the eighth display pixel. For the display device, the same display color as that of the third display pixel is set. The method of claim 11, wherein the plurality of source lines are provided to be parallel to each other, Image display is performed using a display pixel composed of a display pixel displaying a first display color, a display pixel displaying a second display color, and a display pixel displaying a third display color, For the first display pixel group composed of three display pixels included in the display device, and the second display pixel group composed of three display pixels different from the three display pixels included in the first display pixel group, as follows: In other words, Three display pixels included in the first display pixel group include: A third display pixel, a first display pixel, and a second display pixel which are driven by a first gate line and are connected via switching elements to a source line to which the second display pixel is connected via a parasitic capacitance, For the first display pixel, the second display pixel, and the third display pixel, display colors of any one of the first display color, the second display color, and the third display color are set to be different from each other. Three display pixels included in the second display pixel group include: A source line to which the first display pixel is connected via the switching element, and a fourth display pixel to be connected to the second gate line adjacent to the first gate line via the switching element, A source line to which the second display pixel is connected via the switching element, a fifth display pixel to the second gate line via the switching element, and A third display pixel is a source line connected via a switching element, and a sixth display pixel connected to a second gate line via a switching element, The same display color as the second display pixel for the fourth display pixel, the same display color as the third display pixel for the fifth display pixel, and the same display color as the first display pixel for the sixth display pixel are set. Display device. The method of claim 11, wherein the plurality of source lines are provided to be parallel to each other, By using a display pixel composed of a display pixel for displaying a first display color, a display pixel for displaying a second display color, a display pixel for displaying a third display color, and a display pixel for displaying a fourth display color. Image display, For the first display pixel group composed of four display pixels included in the display device, and the second display pixel group composed of four display pixels different from the four display pixels included in the first display pixel group, as follows: In other words, Four display pixels included in the first display pixel group include: A third display pixel driven by the first gate line and connected to the source line to which the second display pixel is connected via only parasitic capacitance through a switching element, A fourth display pixel driven by the first gate line and connected to the source line to which the third display pixel is connected via only parasitic capacitance through a switching element, A first display pixel, and Second display pixel, For the first display pixel, the second display pixel, the third display pixel, and the fourth display pixel, display by any one of the first display color, the second display color, the third display color, and the fourth display color. The colors are set to be different, Four display pixels included in the second display pixel group include: A source line to which the first display pixel is connected through the switching element, and a fifth display pixel to be connected to the second gate line adjacent to the first gate line through the switching element, A source line to which the second display pixel is connected via the switching element, a sixth display pixel to which the second gate line is connected via the switching element, A source line to which the third display pixel is connected via a switching element, a seventh display pixel to be connected to the second gate line via a switching element, and A fourth display pixel is a source line connected via a switching element, and an eighth display pixel connected to a second gate line via a switching element, The same display color as the second display pixel for the fifth display pixel, the same display color as the third display pixel for the sixth display pixel, the same display color as the fourth display pixel for the seventh display pixel, and the eighth display pixel. And a display color which is the same as that of the first display pixel. The method of claim 11, wherein the plurality of source lines are provided to be parallel to each other, Image display is performed using a display pixel composed of a display pixel displaying a first display color, a display pixel displaying a second display color, and a display pixel displaying a third display color, A first display pixel array, a second display pixel array, and a third display pixel array, these being as follows, i.e. The first display pixel array, The first display pixel is made up of a plurality of display pixels connected via a switching element to a first source line connected via a switching element, and any one of a first display color, a second display color, and a third display color. Is set as the display color The second display pixel array is made up of a plurality of display pixels connected via a switching element to a second source line to which the second display pixel is connected via a switching element, The third display pixel array is composed of a plurality of display pixels connected via a switching element to a third source line adjacent to the second source line on the side opposite to the side adjacent to the first source line and the second source line, The display pixels included in the second display pixel array and the third display pixel array are rectangular in two colors except for the display color set for the first display pixel array among the first display color, the second display color, and the third display color. A display device, wherein the display color is set to be a pattern. 19. The display pixel according to claim 18, wherein the display pixel further includes a display pixel that displays a fourth display color, And further comprising a fourth display pixel array, which is as follows, i.e. The fourth display pixel array is composed of a plurality of display pixels connected via switching elements to a fourth source line adjacent to the third source line on the side opposite to the side adjacent to the second source line and the third source line, The display pixels included in the second display pixel array, the third display pixel array, and the fourth display pixel array include the first display pixel among the first display color, the second display color, the third display color, and the fourth display color. A display device characterized in that the display color is set so that three colors except for the display color set for the array become a rectangular pattern. The display device according to any one of claims 12 to 19, wherein the first display color is R color, the second display color is G color, and the third display color is B color. 20. The display device according to any one of claims 12 to 19, wherein the first display color is cyan, the second display color is magenta, and the third display color is yellow. 20. The display device according to any one of claims 13, 15, 17, and 19, wherein the first display color is R color, the second display color is G color, the third display color is B color, and the fourth display. A display device, wherein the color is white. 20. The first display color is cyan, the second display color is magenta, the third display color is yellow, and the fourth display color is drawn according to any one of claims 13, 15, 17, and 19. The display device characterized by the above-mentioned. The display device of claim 11, wherein each of the source lines included in the plurality of source lines is provided in a shape in which L-shaped portions and inverted L-shaped portions are alternately repeated. 12. The method of claim 11, wherein the direction in which the switching elements are connected to each source line included in the plurality of source lines is set to be different each time the gate lines included in the plurality of gate lines are crossed. Display device. A display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of an intersection portion where a plurality of gate lines and a plurality of source lines intersect. The second source line adjacent to the first display pixel connected to the first gate line and the first source line is connected to the second display pixel. The input signal to the first display pixel is corrected based on the input signal to the second display pixel or the write signal to the second display pixel and the capacitance value of the parasitic capacitance formed between the second source line and the first display pixel. And a correction circuit which sets this to the write signal of the first display pixel. A display device in which a display pixel including a switching element and a pixel electrode is disposed corresponding to each of an intersection portion where a plurality of gate lines and a plurality of source lines intersect. For a first display pixel and a second display pixel connected to the same gate line, a source line adjacent to a source line connected to the first display pixel and simultaneously forming a parasitic capacitance between the first display pixel, Connected to the second display pixel, The input signal to the first display pixel is corrected based on the input signal to the second display pixel or the write signal to the second display pixel and the capacitance value of the parasitic capacitance, and this is regarded as the write signal of the first display pixel. And a correction circuit. A driving method of a display device in which display pixels and switching elements are disposed so as to correspond to each of a portion where a plurality of gate lines and a plurality of source lines intersect, first and second driven by the same first gate line The first display pixel is connected via parasitic capacitance to the source line to which the second display pixel is connected via the switching element. A display device characterized in that the write signal to the first display pixel is a signal corrected based on the input signal to the second display pixel or the write signal to the second display pixel. A program for causing a computer to execute the driving method.